US2025024381A1PendingUtilityA1

Systems and methods for controlling power of sidelink reference signals

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Assignee: ZTE CORPPriority: Apr 6, 2022Filed: May 31, 2024Published: Jan 16, 2025
Est. expiryApr 6, 2042(~15.7 yrs left)· nominal 20-yr term from priority
Inventors:Qi YangChuangxin JiangFeng BiFocai PengYu PanJuan Liu
H04W 52/343H04W 52/325H04W 52/281H04W 52/367H04W 52/242H04W 52/383H04W 92/18H04W 52/08H04L 5/0048
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Claims

Abstract

Systems and methods for wireless communication systems are disclosed. In one aspect, the wireless communication method includes determining, by a first wireless communication device, a power and sending, by the first wireless communication device to a second wireless communication device in a sidelink communication, a reference signal with the power. The power is determined based on one or more sidelink parameters related to a priority level associated with the reference signal.

Claims

exact text as granted — not AI-modified
1 . A wireless communication method, comprising:
 determining, by a first wireless communication device, a power; and   sending, by the first wireless communication device to a second wireless communication device, a sidelink positioning reference signal (SL PRS) with the power,   wherein the power is determined based on one or more sidelink parameters including: a first sidelink parameter related to a priority level and a Channel Busy Ratio (CBR), a second sidelink parameter related to capability, and at least one sidelink parameter related to pathloss.   
     
     
         2 . The wireless communication method of  claim 1 , wherein the first sidelink parameter includes a parameter, P MAX,CBR     SL-PRS   ,
 wherein the parameter P MAX,CBR     SL-PRS    represents a sidelink maximum transmission power for the first wireless communication device based on the CBR to send the SL PRS.   
     
     
         3 . The wireless communication method of  claim 2 , wherein the parameter P MAX,CBR     SL-PRS    is determined by at least one of the following parameters: sl-MaxTxPower-PRS, or P CMAX . 
     
     
         4 . The wireless communication method of  claim 3 , further comprising:
 determining, by the first wireless communication device, that the parameter sl-MaxTxPower-PRS is provided by a higher layer; and   determining, by the first wireless communication device, the parameter P MAX,CBR     SL-PRS    by the parameter sl-MaxTxPower-PRS based on the priority level that is associated with the SL PRS and a CBR range.   
     
     
         5 . The wireless communication method of  claim 4 , wherein the priority level is indicated by one of a plurality of integers indicated in Sidelink Control Information (SCI). 
     
     
         6 . The wireless communication method of  claim 3 , further comprising:
 determining, by the first wireless communication device, that the parameter sl-MaxTxPower-PRS is not provided; and   determining, by the first wireless communication device, the parameter P MAX,CBR     SL-PRS    as P MAX,CBR     SL-PRS   =P CMAX .   
     
     
         7 . The wireless communication method of  claim 1 , wherein the at least one parameter related to pathloss includes: P SL-PRS,D (i) and P SL-PRS,SL (i),
 wherein the parameter P SL-PRS,D (i) represents a power based on downlink pathloss, and the parameter P SL-PRS,SL (i) represents a power based on sidelink pathloss.   
     
     
         8 . The wireless communication method of  claim 7 , wherein the parameter P SL-PRS,D (i) is selectively determined based on P O,D   SL-PRS  and α D   SL-PRS ; and wherein the parameter P O,D   SL-PRS  represents an expected power, and the parameter α D   SL-PRS  represents the downlink pathloss factor. 
     
     
         9 . The wireless communication method of  claim 7 , wherein the parameter P SL-PRS,SL (i) is selectively determined based on PL SL  that represents a sidelink pathloss estimation for unicast transmission of the SL PRS. 
     
     
         10 . The wireless communication method of  claim 9 , wherein the parameter P SL-PRS,SL (i) is selectively determined base on P O,SL   SL-PRS  and α SL   SL-PRS ; and wherein the parameter P O,SL   SL-PRS  represents an expected power, and the parameter α SL   SL-PRS  represents a sidelink pathloss factor. 
     
     
         11 . The wireless communication method of  claim 9 , wherein the PL SL  is calculated using referenceSignalPower and higher layer filtered RSRP, where referenceSignalPower is obtained from a SL PRS transmission power per resource element (RE), and higher layer filtered RSRP is a reference signal received power (RSRP) that is obtained from the SL PRS and reported to the first wireless communication device from the second wireless communication device receiving the SL PRS. 
     
     
         12 . The wireless communication method of  claim 2 , wherein the parameter P MAX,CBR     SL-PRS    is configured by a base station. 
     
     
         13 . A first wireless communication device, comprising:
 at least one processor configured to:   determine a power; and   send, via a transmitter to a second wireless communication device, a sidelink positioning reference signal (SL PRS) with the power,   wherein the power is determined based on one or more sidelink parameters including: a first sidelink parameter related to a priority level and a Channel Busy Ratio (CBR), a second sidelink parameter related to capability, and at least one sidelink parameter related to pathloss.   
     
     
         14 . A second wireless communication device, comprising:
 at least one processor configured to:
 receive, via a receiver from a first wireless communication device, a sidelink positioning reference signal (SL PRS) with a power, 
   wherein the power is determined by the first wireless communication device based on one or more sidelink parameters including: a first sidelink parameter related to a priority level and a Channel Busy Ratio (CBR), a second sidelink parameter related to capability, and at least one sidelink parameter related to pathloss.   
     
     
         15 . A wireless communication method, comprising:
 receiving, by a second wireless communication device from a first wireless communication device, a sidelink positioning reference signal (SL PRS) with a power,   wherein the power is determined by the first wireless communication device based on one or more sidelink parameters including: a first sidelink parameter related to a priority level and a Channel Busy Ratio (CBR), a second sidelink parameter related to capability, and at least one sidelink parameter related to pathloss.   
     
     
         16 . The wireless communication method of  claim 15 , wherein the first sidelink parameter includes a parameter, P MAX,CBR     SL-PRS   , and
 wherein the parameter P MAX,CBR     SL-PRS    represents a sidelink maximum transmission power for the first wireless communication device based on the CBR to send the SL PRS.   
     
     
         17 . The wireless communication method of  claim 16 , wherein the parameter P MAX,CBR     SL-PRS    is determined by at least one of the following parameters: sl-MaxTxPower-PRS, or P CMAX . 
     
     
         18 . The wireless communication method of  claim 17 , wherein:
 the parameter sl-MaxTxPower-PRS is provided by a higher layer; and   the parameter P MAX,CBR     SL-PRS    is determined by the parameter sl-MaxTxPower-PRS based on the priority level that is associated with the SL PRS and a CBR range.   
     
     
         19 . The wireless communication method of  claim 18 , wherein the priority level is indicated by one of a plurality of integers indicated in Sidelink Control Information (SCI). 
     
     
         20 . The wireless communication method of  claim 17 , wherein:
 the parameter sl-MaxTxPower-PRS is not provided; and   the parameter P MAX,CBR     SL-PRS    is determined as P MAX,CBR     SL-PRS   =P CMAX .

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